Update to bootstrap tool flex/lex

From:

John Marino <dragonflybsd@xxxxxxxxx>

Date:

Wed, 16 Jan 2013 20:12:41 +0100

I just updated a 17-year tool, flex, the master branch. It's a
bootstrap tool. I think quickworld will still work, but I only tested
the full buildworld. If you see any strange build errors involving lex,
you probably want to do a full buildworld.
John